1)У+74=172. У=172-74 у=98. 2)х+х+18=66 2х=66-18 х=48:2. Х=24. 3) 35z=331-86. 35z=245 z=245:35 z=7 4) 2m=127+45. m=172:2. m=86. 5) 3p=233-120+97. 3p=210 p=210:3 p=70
<span> (x+20)*45=3105</span>
<span>45х + 900 = 3105</span>
<span>45х = 3105-900</span>
<span>45х = 2205</span>
<span>х =2205/45</span>
<span>х=49</span>